The standard JK Hawk 3030 ceramic motor is a really good teacher and a nice bracket motor as well. This is
likely the second most flogged motor package I've ever done. That a given it is still far from being totally explored.
In it's stock, out of the package configuration this is a 65 watt motor, 58,000 RPM that can be coxed to around
80-82 watts if you give it the full Monty blueprint. Roughly the power of a well sorted 16D.
Kenon X-MOD's Neo magnets will bump that to 100 blueprinted watts.
Boost gap flux with a set of Emovendo will yield another 4-5 watts, now 104-105 watts. Right on the "knee" of
the magnet for this wind on this blank.
This motor this well sorted has an RMS power percentage 66.5%. That's 70 watts RMS vs 43 watts out of the
bag. Remember this is the number that is moving the car down track.
Besides the fact the flux field is well in excess of what almost all of your experts would tell you is "over fluxed"
it continued to respond in both peak and RMS power levels and a huge increase in spool rate. 3,900 rpm stock to
9,000 rpm Emo/blueprinted to the 0.1 second mark.
The really remarkable thing here is the RMS percentage. Of all the numbers; this is the one that catches my
eye quickest. It wouldn't if it were the only motor I'd ever done. If it were I wouldn't know that current Open Neo
motors being explored in Neo AA/FC struggle to present with 40-45%.
When you have a motor nicely fluxed you pull the rpm down a little to get good peak power and high
percentage peak RMS power for the blank. Over fluxed is that condition where your drag RPM into the basement
and sacrifice RMS power "percentage". Your only reward is HUGE torque per amp up front.
"A little" is actually a prime indicator of "nicely fluxed".
Having said that there is two more items that have a bearing on the outcome. Remember I said "for the blank".
In this test sequence I did on this wind we introduced a Bugenis blank and commutator with a few degrees
less timing. The result was an increase in peak power to 113 watts. An increase in RMS power to 75.5 watts from
the previous 69.6 watts, AND an increase in RMS percentage from 66.5% to 66.8% with some RPM loss. This
bumped the 0.1 second RPM point to 10,250 RPM. 263% quicker spool rate over stock.
Stock Fully Modified
RPM @ 15 amps 58,000 57,000
Spool 3,933 10,250
Peak Power 63 113
RMS Power 43 76
RMS Percent 66.68% 66.79%
Peak RPM of any motor combination was 64,900 RPM.
I'm telling you that as flux increased; RPM, Power and RMS percentage along with spool rate increased. At
some point it peaked RPM and additional flux increases started pulling rpm back. That says your getting close.
Your on pretty solid ground as long as RMS percent continues to climb with increases in Peak power.
When I dropped the Bugenis armature in it, there was a plummet in RPM that was the result of increased gap
flux where the increase comes from better current to flux conversion on the pole side and not from the magnets
side or from gap distance. All three are contributors. Better Iron is good.
We were running these 65/30 motors in Funny Cars with no minimum weight. I could have put this armature
in the X-MOD's magnet block, brought the RPM up and left the gearing alone. That was a possibility. What I chose
to do was to raise the gearing from 4.55 to 3.51 and let the short time tell me if this combination had the grunt to
justify the .1% increase in RMS conversion. The response? Short time picked up from .1097 to .0947 and lowered
ET from the .560's to the .520's even though over all it lost a little under 2 MPH to 45/46 mph.
Stock motor pulled the car at 70 grams to .6048 @ 48.36 mph on a .1351 short time.
My Open motor program was more "follow the leader" that concentrated on magnet gauss measurements.
That was a mistake. Just like moving to that platform was a mistake. These 4.4 gauss measurements and
tight gaps were knocking these motors back from 200,000+ rpm to under 150,000 rpm and actually SLOWING the
spool rate to the tenth second mark. Greed and blindly following will upset things in a hurry.
|Kahale & Martin Research
|65/30 Motor Room